Scale



March 5, 1935. N. A. HALLwooD 1,993,443

SCALE Filed Feb'f, 1930 l l l l l l ||J11 Hcz//WOOCZ Patented Mer. s, 193.5V Y i 1,993,443

UNITED STATES PATENT OFFICE SCALE t e e Nathan A. Hallwootl, Columbus, Ohio Appucatien February 7, 1930, serial No. 426,687

' 6 claims. (o1. ess- 58) u This invention relates to improvements in cator toweror housing which arises stationarily n e `weighing scales, `and is particularly directed to from the base of the scale, and these *inner f scales of the so-called even balance type, ends of the brackets are provided with a'pair of wherein, the characteristic feature of which is a spaced upwardly extending rods which are lobeam or lever pivoted at the center of its length cated within the tower. The upper ends of these Y `5 carrying at opposite ends suitable pans or rods are pivotally connected with the ends of a receivers for the commodity to be weighed and transversely extending cross link to which is rigcounter-weights respectively. In the use of a idly xed the lower portion of an oscillating indie scale of this character it is customary' to place cator or pointer, the upper end of the latter travthe `commodity to be weighed upon one receiver eling over an arcuate scale arranged in the upper `10 and addi known weights tothe other receiver portion of the tower. By this arrangement when until the beam is approximately balanced. It the beam oscillates from a normally balanced pohas been customaryin'sc'ales of this type to prosition one of the out-riders will descend while the vide the beam or lever with-motion transmitting other moves upwardly in proportional increfmeans for imparting oscillatory motion to a movments or travel. 4This results in corresponding 15 able pointer arranged for travel over an arcuate downward motion on the part oi one of said 'j scale provided in the upper portion of a housing rods and upward motion on the part of the other whichV arises stationarily and centrally from the with the result that the link connecting the base "of the scale and wherein mechanism is proupper ends of the rods is moved'to assume anguvided for returning the pointer and the lbeam to lar positions with respecte to the horizontal, 20

A,a normal'position` when thescale is unweighted. thereby oscillating the indicator or pointer over The` motion 4transmitting means between the the arcuate scale to provide visual indication of `'beam and the pointerusually provide for multithe degree of deflection of the beam from its balplied motion ofthe pointer with respect to the anced position. ',motion of the beam in order that by observing It is another object of the invention to asso- 25 the relative rpositions of the pointer with Vreciate spring means with the indicator supportspect tothe arcuate scale the degree oi deflection ing and operating mechanism arranged in the oflthe beam-from itsV normal position may be tower, whereby Vsaid spring means willbe disg conveniently and accurately determined. torted when the beam moves from its balanced f It is a primary object-of the present invention position in response to uneven distribution of 30 toprovide an: improvement in suchY scales by weights on the weight supports and whereby providing an improved form of motion transmitwhen the beam is unweighted said spring means tingV means fel" effecting JChe Oscillation 0i the will function to effect the restoration of the beam pointer or indicator which is movable over an arand the pointer to n0rma1 positions.

Cal

1 35 ella'lie Seele fOI ihe'DU-IDOSeS 0f delletiiig the bal- Y With these and other objects in view which 35 aimed-and lllblellieed DOSitinS 0f the Weighing will appear as the description proceeds, the inmeans, Vand wherein instead of operating said `ventien consists in the novel features of conmotion transmitting means directly frOm Vthe struction, combinations of elements and art beam the said means are directly operated from rangements of parts hereinafter to be fully de- 40 thepiveted WeightleeeVelSV Cal'ried by the OPDQ- scribed and pointed out in the appended claims. 40

e site ends of the beam to the end of'securing free In the accompanying drawing;

and positive operation 011th@ part` 0f the ndca- Figure 1 'n a View partly in side elevation and -tOr with negligible IieiOIL `iileellfinieel COmPlvertical section oi an even balance weighing scale i Catiolland Othercondtons Which .tend O'Set up constructed in accordance with the present in- 1.5 `error and short `operating life Vin previous mechventon, e

4lmiSIliS 0f this ehaleetel- Figure 2 is a vertical transverse sectional View In accorder-Ce With the pieSeDi iIlVeniOIL'ifhe ,taken through the indicator tower of the scale central pivoted beam oi the Vscale carries at its on the line 2 2 of Figure 1,

' 4outer ends JBhe visual Weight receivers and llfleir Figure 3 is a transverse horizontal sectional' out-riders, which travel vertically. These out- View on the line 3 -3 oi Figure 1, and 50 Vriders arepiOVidefi With fixed Aiiiili'eldli eX'eIld- K Figure 4 is a detail view of a modified form of ing bracketswhich move in unison with the outthe invention.

riders; in response to oscillatory movements on Referring more particularly to the drawing, the

ythel part of the beam.l The inner ends of the base oi the scale is indicated by the numeral 1, f Vbracket'terminate iii a eeillillfdflly arranged indi* instance the base comprising the usual 55 hollow cast body arranged to be mounted on a counter or other form of support. The upper portion of the base is provided centrally with a stirrup 2 which carries the usual fulcrum box for the reception of the knife edge bearings 3 of the scale beam or lever 4. The outer ends of the beam or lever carry the usual knife edges 5 which effect the pivotal support of the out-riders 6, the upper portions of the latter being provided with the customary plates or pans 7 constituting Weight'receivers. Aknown weightis applied to one of these receivers and the commodity to be weighed to the otherl so that when the beamis in a balanced position the weight of the commodity will be apparent by reference to the known weight. The out-riders are provided vwith the.

usual depending stems 8 which move vertically in openings provided therefor .inV the base f1 in response to the oscillation of the beam 4. The lower ends of the stems 8 are connected with a horizontally extending checkrod 9 arranged'in `the .base 1 andpivoted at .the center as-at 10 in -vertical alignment with the bearings 3. A dash 4pot .l1 isformed in the base l and is connected, as usual, with the beam 4 to dampenthe oscillations of the latterin response to weight applications. Stationarily mountedon the base 1 and arising from the upper central portion thereof is .an .indicator tower 12, the upper vend of the .latter being provided with an arcuate Vscale 13 formedvwith suitable graduations. `(lo-operative Withrthe scale-is an indicator or pointer 14 which is adapted to travel over the scale in response to theoscillations ofthebeam, wherebythe degree of deflection ofthe beam from itsnormal balanced .positionmaybereadily noted. The scale so far described-is of common construction, well under- .stood by those skilled .in the art, and therefore a further .detailed description relative thereto is not ,deemed necessary.

`.The present inventionhas particular reference to lthemechanismior electing the mounting of 'the pointer .14,and .the .movement of vsuch pointer over the scale `13 in response to the movements of the beam from Vits normalposition. Heretofore ithasbeen customaryto operate the pointer by means .of motion transmitting mechanism carried directly by the beam and v,I have foundpthat such mechanisms are unreliablein practice andare vquite apt to vintroduceerror into the operating mechanism rof the indicator or pointer due fprin cipally tothe oscillating motion of the beam when itjisdeiected from normal. Instead of utilizing directly the motion rof the beam the present invention resides in operating the Vunder and over weight indicator 1`4"`fr'om the weight receivers or v.out-riders' which, because 'of their pivotal mountings on the endsof "thebeam, reciprocate back and forth vertically when the beam is oscillated, and I have found that this reciprocatory motion maybe advantageously used in effecting the operation of the :pointer in lieu of the1 customary oscillatory movement.

,To this end the out-riders are provided with inwardly extending brackets l5 `which are rigidly lconnected with the out-riders at their outer ends, r'as indicated at 16. These brackets lie .substantiallyhorizontally above the beam 4 and the inner .ends of the brackets project through vertical slots 17 providedin the side walls of the tower 12. 'I'he spaced inner ends o the .brackets are formed toincludesockets for the rigid connection of the .lower ends cfa .pair of spaced vertically positioned rods 1B which are .adapted to move with the out-riders 6. The upper ends of these rods .and arevmaintained in such normal 18 are threaded for the adjustable reception of ears 19 which are positioned, as shown in Figure 3, in slots provided in the bifurcated outer ends of a cross link 20. This cross link carries and is rigidly secured to the'lower end of the pointer 14 and provides a base for the pointer. Contiguous to their lower ends the rods 18 carry collars 21 which are adjustably positioned upon the rods and held in frictional engagement therewith by any suitable fastening means such as screws or the like. Between the collars 21 is confined a coil spring 22, which has its ends secured in any desired manner to the collars. The spring 22, which is subjected to a exible action by the movement of the rods 18 in opposite directior `ments vof travel directly proportional to the movements of the out-riders with which. they are fconnected. As a resultof this relative movement on the part of the rods, the link 20 which is carried directly by therods 18 is moved to an angular position with respect to the true horizontal position which it normally occupies when the beam is balanced equally at both of its ends. This results in the oscillation of thepointer over the arcuate scale from its normal zero. position and in a direction dependent upon which of the weight receivf ers containsrthe greater weight. In this manner under and over weights may be readily denoted rby comparing the position of the pointer with respect tothe zero position provided centrally on the scale 13. When the weights have been removed from the plates 7 the beam together with the pointer 14 are returned to normal rpositions positions by the operation of the spring 22. I t

In Figure 4 a slight structural variation of the vinvention is disclosed wherein a spring k23 is used yin lieu of the spring 22 for performing the same .-functions. The spring 23 is connected at its lower end with Va. support 24 carried by the tower 12,

while the upper end yof the spring is connected with a boss 25 depending from the lower central portion of the cross link 20a. Either the spring constructions 22 or 23 may be employed advantageously. 'I'he l pointer operating mechanism disclosed has the advantage of simplicity in construction together with accuracy and reliability in operation. Friction has been reduced to a minimum to relieve the operation of the scale vfrom error vdue to this cause.

It will be understood that the present invention is notto be limited to the specific structural arrangement lset forth but that such arrangements may be varied from time to time without departing from the essential principles and. spirit of the invention as thelatter has been expressed in the following claims.

What is claimed is: Y

1. In a weighing scale, a, base, a centrallypivoted Abeam mounted on said base, weight receivers pivotally mounted on said beam contiguous to the ends thereof, an indicator tower arising centrally and stationarily from said base between said weight receivers and provided at its upper end with a chart, an indicator arranged in said tower and movable over said chart, brackets secured to brackets, a cross member pivotally connected at its ends with theupper ends of said rods and to which cross member the lower portion of said increator is directly connectedwhereby said indicator is supported from said weight receivers and operated directly by the motion thereof, and spring means co-operative with said cross member',` arranged in said tower for returning said beam and indicator to normal position.

"2. In ascale, a base, a centrally pivoted even Vbalance beam mounted on said base, weight receivers pivotally mounted on said beam contigu- .ousto the ends thereof, an indicator tower arisf, ing centrallyV and stationarily from said base between, said weight receivers and provided at its upper end with a chart, an indicator arranged in` Vwith said members and to` which cross link the l tor to a normal position. Y 3. In a weighing scale, a base, a centrally pivoted beam Vmounted on said base, weight receivers said tower and movable over said'chart, vertically f arranged members secured to said weight receivers, across linkpivotally connected at its ends base portion of said indicator is directly connected, wherebyv said indicator is supported from said weight receivers and operated directly by the motion thereof, and a. helical spring connected centrally of said cross link and to said indicating tower and serving' to return said beam and indicapivotally mounted on said beam contiguous to the ends thereof, an indicator tower arising centrally and `stationarily from said' base between said weight receivers and provided at its upper end with a chart, an indicator arranged in said tower and movable over said chart, brackets secured to said weight receiver and extending into the lower portion ci said tower, spaced upwardly extending `rods rigidly connected with the inner ends of said brackets, a cross member pivotally connected at its ends with the upper ends of said rods and to which cross member the lower portion of said indicator is directly connected, whereby said indicator` is supported from said weight receiver and operated directly by the motion thereof, and spring means for returning said beam and indicator to a normal position.

4. In a scale, a base, a centrally pivoted even balanced beam mounted on said base, weight receivers pivotally mounted on said beam contiguous to the ends thereof, an indicator tower arising centrally and stationarily from said base between said weight receivers and provided at its upper end with a chart, 'an indicator arranged in said tower and movable over said chart, vertically arranged members rigidly secured to said weight receivers, a cross linkpivotally connected at its ends with the upper ends of said members and to which cross link the lower portion of said indicator is directly connected, whereby said indicator `is supported from said weight receiver and operated directly by the motion thereof.

5. In a scale, a base, a centrally pivoted even balanced beam mounted on said base, weight re ceivers pivotally mounted on said beam contiguous to the ends thereof, an indicator tower arising centrally and stationarily from said base between said weight receivers and provided at its upper end with a chart, vertically arranged members rigidly secured to said weight receivers and larranged for movement within said tower, and an indicator arranged in said tower and movable over said chart, said indicator includes a fulcrumless base pivotally connected to the upper ends of said members whereby said indicator is supported from said weight receivers and operated directly by the motion thereof.

6. In a scale, a base, a centrally pivoted even balanced beam mounted on said base, weight reoeivers pivotally mounted on said beam contiguous to the ends thereof, an indicator tower secured to said base and provided at its upper end with a chart, vertically varranged members rigidly secured to said weight receivers, a cross link pivotally connected at its ends with the upper ends of said members, and an indicator provided upon said link and movable over said chart in response to the action of said weight receivers.

NATHAN A. HALLWOOD. 

